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Geology Notes April 19

by: Carter Cox

Geology Notes April 19 GEO 101

Carter Cox

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About this Document

cover ocean
Dynamic Earth
Class Notes
Dynamic, EARTH, Geology
25 ?




Popular in Dynamic Earth

Popular in Geology

This 4 page Class Notes was uploaded by Carter Cox on Wednesday April 20, 2016. The Class Notes belongs to GEO 101 at University of Alabama - Tuscaloosa taught by Keene in Spring2015. Since its upload, it has received 25 views. For similar materials see Dynamic Earth in Geology at University of Alabama - Tuscaloosa.


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Date Created: 04/20/16
Oceans and Coasts Urbanization - Increased paved areas - Building in floodplains - Pollution Agriculture - Increase sediment in streams - Change the stream chemistry o Fertilizers o Animal waste - Ecosystem change Dam Construction - Changes ecosystem o Migrating fish o Sediment load o Nutrients - Flood control o Positive and negative Overuse- our water - Central Arizona project canal - Los Angeles canal Ocean Floor Features Continental Shelf Continental Slope Abyssal Plain Seamounts Canyons (underwater) - Rivers cut into sediment Continental Margins - Passive - Active - Makes different shorelines Water - 3.5% o Halite, gypsum o Dense (how salty it is) o Salinity depends on location and temperature - Temperature o Latitude o Depth Currents - Flowing water in defined area o Surface o Deep Surface Currents - Driven by wind/ affected by Coriolis effect Deep Currents - Down welling - Upwelling - Caused by o Density (thermohaline circulation)  Temperature  Salinity Tides - High and low tides - The larger tidal bulge is on the side closer to the moo - Smaller tide on the other side of earth opposite of the moon - Tidal reach Waves - Energy moves forward - Water stays put Open ocean waves - Energy moves forward - Water stays Breaker - Friction between wave and ocean floor Wave Refraction Long shore Current - Costal Landforms Beach - Near shore - Intertidal zone - Backshore - Dune - Some beaches grow - Other erode Beaches: barrier islands - Sand islands - Always changing Tidal Flat - High Tide- covered by water - Low Tide- exposed Rocky Coast - Embayment - Headland - Always Changing Fjords - Glacial valley - Flood after glaciers melt Coastal Wetland - Shallow Water - No Wave Action - Temperate climate o Salt marsh - Subtropical climate o Mangrove swamp Coral Reef - Shallow, warm - Grows until conditions change - Erodes into coral sand Estuaries - Ocean rises into river valley - Mix of fresh and salt water What determines type of coast? - Tectonic Settling - Sea level - Sediment Supply - Climate Human Interaction with the Coast - 44% of the world population lives less than 150 km from coasts - 53% in US - Coasts always changing - What does this mean? Sea Level Rise - Only a matter of Time Beach Erosion - Groin- barrier built to keep sand from eroding


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